A camera which uses a film cartridge equipped with an indicating section for indicating an exposed state of a film housed within the film cartridge comprises a film compartment for accommodating the film cartridge, a cover member for closing the film compartment, and an ejector formed within the film compartment. The ejector blocks the mounting of the film cartridge in readiness for photographing when the exposure-state indicating section takes a development-completed condition indicating position, a completely exposed condition indicating position or a partially exposed condition indicating position, while allowing the film cartridge to be mounted therein for photographing when it takes a non-exposed condition indicating position. In addition, the ejector pushes the film cartridge out of the film compartment when the cover member is opened after a completion of photography. The ejector can be provided with a member which prevents a film cartridge from inadvertently dropping out the camera during unloading thereof.